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vol.3 número1A study on the epidemiologic cynetics of the human infection by Trypanosoma cruzi through the application of the "reversible catalytic model"Levels of health in the county of São Paulo, Brazil from 1961 to 1967 índice de autoresíndice de materiabúsqueda de artículos
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Revista de Saúde Pública

versión impresa ISSN 0034-8910versión On-line ISSN 1518-8787

Resumen

REIS, Ubiratan Lemos dos; FRANCA, José B. Meirelles  y  ROCHA E SILVA, Eduardo O. da. A cheaper criterion in helping to select the method to combat triatomid vectors of Chaga's disease. Rev. Saúde Pública [online]. 1969, vol.3, n.1, pp.31-39. ISSN 1518-8787.  https://doi.org/10.1590/S0034-89101969000100005.

Although the antimalarial campaign always had priority, the Serviço de Erradicação de Malária e Profilaxia da Doença de Chagas of the State of São Paulo (Brazil) never neglected, even at the beginning of the campaign, to fight against the triatomid vectors of Chagas' Disease. Because there was no interruption in the prophylaxis, it is not unusual at present to find several localities without triatoma, mainly in the areas where the Triatoma infestans was predominant. This is due not only to the methods of prophylaxis adopted, but also to the socio-economic development of the region. On account of the reduction of the number of foci and density of triatoma the authors found total coverage spraying unnecessary, giving preference to the Selective method. Through a comparative study of costs for the two methods of disinsectization, a mathematical formula was established, for the determination of up to what percentage of infestation in the houses of an area, the selective method, which has been said to be the best, is also the most economical. Knowing the unitary cost of the investigated house (Cp) and the sprayed house (Ce) it is possible to determine the percentage of infested houses (Xe) to which the cost of the work is the same, be it total spraying, be it selective spraying, using the formula Xe = 100 (1- Cp/Ce); to a percentage of houses infested with less than Xe, the Selective method will cost less.

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